CA2244342A1 - A method and apparatus for measuring well characteristics and formation properties - Google Patents

A method and apparatus for measuring well characteristics and formation properties

Info

Publication number
CA2244342A1
CA2244342A1 CA002244342A CA2244342A CA2244342A1 CA 2244342 A1 CA2244342 A1 CA 2244342A1 CA 002244342 A CA002244342 A CA 002244342A CA 2244342 A CA2244342 A CA 2244342A CA 2244342 A1 CA2244342 A1 CA 2244342A1
Authority
CA
Canada
Prior art keywords
neutron
count rates
porosity
acquired
calculated
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002244342A
Other languages
French (fr)
Other versions
CA2244342C (en
Inventor
Nihal I. Wijeyesekera
Hugh D. Scott
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schlumberger Canada Ltd
Original Assignee
Schlumberger Canada Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schlumberger Canada Ltd filed Critical Schlumberger Canada Ltd
Publication of CA2244342A1 publication Critical patent/CA2244342A1/en
Application granted granted Critical
Publication of CA2244342C publication Critical patent/CA2244342C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V5/00—Prospecting or detecting by the use of nuclear radiation, e.g. of natural or induced radioactivity
    • G01V5/04—Prospecting or detecting by the use of nuclear radiation, e.g. of natural or induced radioactivity specially adapted for well-logging
    • G01V5/08—Prospecting or detecting by the use of nuclear radiation, e.g. of natural or induced radioactivity specially adapted for well-logging using primary nuclear radiation sources or X-rays
    • G01V5/10—Prospecting or detecting by the use of nuclear radiation, e.g. of natural or induced radioactivity specially adapted for well-logging using primary nuclear radiation sources or X-rays using neutron sources
    • G01V5/107—Prospecting or detecting by the use of nuclear radiation, e.g. of natural or induced radioactivity specially adapted for well-logging using primary nuclear radiation sources or X-rays using neutron sources and detecting reflected or back-scattered neutrons

Abstract

The present invention provides for method and an apparatus for determining the porosity of a geological formation surrounding a cased well. The method further comprises of generating neutron pulses that release neutrons into an area adjacent the well, from a neutron source. Neutrons are sensed and a plurality of neutron detector count rates is acquired using at least two neutron source to neutron detector spacings. A
timing measurement is acquired at one of the spacings to measure a first depth of investigation. A ratio of the neutron detector count rates is acquired to measure a second depth of investigation. An apparent porosity is calculated using the timing measurements and the ratios of neutron count rates. The effect of a well casing on the calculated apparent porosity is determined in response to at least one of the ratio of neutron detector count rates and the timing measurement. A cement annulus is computed based on the ratios of neutron count rates and the timing measurement. A formation porosity is calculated by performing a correction to the apparent porosity for the casing and the cement annulus.
CA002244342A 1997-07-31 1998-07-29 A method and apparatus for measuring well characteristics and formation properties Expired - Fee Related CA2244342C (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US5429397P 1997-07-31 1997-07-31
US60/054,293 1997-07-31
US09/120,255 1998-07-21
US09/120,255 US6032102A (en) 1997-07-31 1998-07-21 Method and apparatus for measuring well characteristics and formation properties

Publications (2)

Publication Number Publication Date
CA2244342A1 true CA2244342A1 (en) 1999-01-31
CA2244342C CA2244342C (en) 2001-07-24

Family

ID=21990060

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002244342A Expired - Fee Related CA2244342C (en) 1997-07-31 1998-07-29 A method and apparatus for measuring well characteristics and formation properties

Country Status (11)

Country Link
US (1) US6032102A (en)
EP (1) EP0895097B1 (en)
CN (1) CN1209500A (en)
AU (1) AU741091B2 (en)
CA (1) CA2244342C (en)
CO (1) CO4790187A1 (en)
DE (1) DE69836053D1 (en)
EG (1) EG21387A (en)
NO (1) NO983502L (en)
RU (1) RU2199010C2 (en)
SA (1) SA98190827B1 (en)

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US6703606B2 (en) * 2000-09-28 2004-03-09 Schlumberger Technology Corporation Neutron burst timing method and system for multiple measurement pulsed neutron formation evaluation
US6648083B2 (en) 2000-11-02 2003-11-18 Schlumberger Technology Corporation Method and apparatus for measuring mud and formation properties downhole
US6768106B2 (en) 2001-09-21 2004-07-27 Schlumberger Technology Corporation Method of kick detection and cuttings bed buildup detection using a drilling tool
US6944548B2 (en) * 2002-12-30 2005-09-13 Schlumberger Technology Corporation Formation evaluation through azimuthal measurements
US20040178337A1 (en) * 2003-03-11 2004-09-16 Baker Hughes Incorporated Neutron detector for downhole use
US6754586B1 (en) 2003-03-28 2004-06-22 Schlumberger Technology Corporation Apparatus and methods for monitoring output from pulsed neutron sources
US7430479B1 (en) 2004-08-17 2008-09-30 Science Applications International Corporation System and method for analyzing content data
US7361886B2 (en) * 2005-02-28 2008-04-22 Schlumberger Technology Corporation Corrections of gamma-ray responses
US7365307B2 (en) * 2005-02-28 2008-04-29 Schlumberger Technology Corporation Sigma/porosity tools with neutron monitors
US7642507B2 (en) * 2005-02-28 2010-01-05 Schlumberger Technology Corporation Apparatus and methods for interlaced density and neutron measurements
US7365308B2 (en) * 2005-07-26 2008-04-29 Baker Hughes Incorporated Measurement of formation gas saturation in cased wellbores using pulsed neutron instrumentation
EP1953571B1 (en) * 2007-02-05 2015-06-03 Services Pétroliers Schlumberger Nuclear tool used in a borehole to determine a property of the formation
US20090045329A1 (en) * 2007-08-16 2009-02-19 Schlumberger Technology Corporation Downhole Tools Having Combined D-D and D-T Neutron Generators
US8642944B2 (en) * 2007-08-31 2014-02-04 Schlumberger Technology Corporation Downhole tools with solid-state neutron monitors
CN101255793B (en) * 2008-03-28 2013-09-18 西安奥华电子仪器有限责任公司 Impulse neutron complete spectrum saturability logging instrument variable parameter neutron pulse timing mode
EP2458409A3 (en) * 2008-11-18 2014-09-10 Schlumberger Holdings Limited Systems and methods for neutron porosity determination with reduced lithology error
WO2010088439A2 (en) * 2009-01-30 2010-08-05 Schlumberger Canada Limited System and method for matching lithology responses of downhole tools having different source energies
US9031790B2 (en) * 2010-03-23 2015-05-12 Schlumberger Technology Corporation System and method for correction of borehole effects in a neutron porosity measurement
US9372277B2 (en) * 2010-04-21 2016-06-21 Schlumberger Technology Corporation Neutron porosity downhole tool with improved precision and reduced lithology effects
US8242436B2 (en) * 2010-11-30 2012-08-14 Sondex Limited Neutron porosity logging tool using microstructured neutron detectors
CN102094644A (en) * 2011-01-14 2011-06-15 太平洋远景石油技术(北京)有限公司 Method for evaluating TNIS sleeve-penetrating imaging reservoir fluid
GB2488117B (en) * 2011-02-15 2013-03-27 Reeves Wireline Tech Ltd Method of logging a borehole and related apparatus
US8378292B1 (en) * 2011-07-28 2013-02-19 Sondex Wireline Limited Neutron porosity measurement devices with semiconductor neutron detection cells and methods
US9798037B2 (en) 2012-09-05 2017-10-24 Schlumberger Technology Corporation Compensated sigma from measurements made by a pulsed neutron instrument
US9885802B2 (en) 2013-10-01 2018-02-06 Baker Hughes, A Ge Company, Llc Downhole cement evalution using pulsed neutron measurements
MX2017002734A (en) * 2014-09-10 2017-10-20 Halliburton Energy Services Inc Multi-sensor workflow for evaluation of water flow in multiple casing strings.
GB2562982B (en) * 2016-04-19 2022-07-27 Halliburton Energy Services Inc Identification of annulus materials using formation porosity
WO2018057035A1 (en) * 2016-09-26 2018-03-29 Halliburton Energy Services, Inc. Neutron porosity log casing thickness corrections
CN106483045B (en) * 2016-10-14 2019-06-07 西南石油大学 For testing the experimental rig and method of Inter-zonal packing performance after cement sheath perforation
US11332655B2 (en) 2017-02-22 2022-05-17 Halliburton Energy Services, Inc. Slurry design process
CN110286137B (en) * 2019-07-24 2022-04-08 水利部交通运输部国家能源局南京水利科学研究院 Steel shell concrete interface equivalent void neutron method detection device
CN116500694B (en) * 2023-06-28 2023-09-01 中海油田服务股份有限公司 Post-sleeve physical quantity inversion method, post-sleeve physical quantity inversion device, computing equipment and storage medium

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US3818225A (en) * 1972-09-18 1974-06-18 Texaco Inc Methods for thermal neutron diffusion coefficient logging
US3979300A (en) * 1974-07-17 1976-09-07 Texaco Inc. Three frequency modulated combination thermal neutron lifetime log and porosity
WO1984000407A1 (en) * 1982-07-14 1984-02-02 Shawky Shafeek Michael Modified brake shoe pads
US4760252A (en) * 1983-06-28 1988-07-26 Schlumberger Technology Corporation Well logging tool with an accelerator neutron source
US4625110A (en) * 1983-10-24 1986-11-25 Halliburton Company Epithermal neutron porosity measurement
US4638161A (en) * 1983-10-24 1987-01-20 Halliburton Company Epithermal neutron porosity measurement
US4972082A (en) * 1989-03-16 1990-11-20 Schlumberger Technology Corporation Methods and apparatus for epithermal neutron logging
DE3930571A1 (en) * 1989-09-13 1991-03-14 Wabco Westinghouse Fahrzeug METHOD FOR MONITORING A BRAKE DEVICE FOR OVERLOAD
US5051581A (en) * 1990-05-01 1991-09-24 Schlumberger Technology Corporation Method and apparatus for epithermal neutron porosity well logging
US5235185A (en) * 1992-01-09 1993-08-10 Schlumberger Technology Corporation Formation sigma measurement from thermal neutron detection
US5349184A (en) * 1993-01-21 1994-09-20 Schlumberger Technology Corporation Method and apparatus for reducing matrix density effects on porosity measurements during epithermal neutron porosity well logging
GB9503274D0 (en) * 1995-02-21 1995-04-12 Sun Electric Uk Ltd Method and apparatus for machine diagnosis
US5699246A (en) * 1995-09-22 1997-12-16 Schlumberger Technology Corporation Method to estimate a corrected response of a measurement apparatus relative to a set of known responses and observed measurements

Also Published As

Publication number Publication date
NO983502D0 (en) 1998-07-30
EP0895097A3 (en) 2003-11-19
AU741091B2 (en) 2001-11-22
NO983502L (en) 1999-02-01
CN1209500A (en) 1999-03-03
RU2199010C2 (en) 2003-02-20
SA98190827B1 (en) 2006-05-01
EP0895097B1 (en) 2006-10-04
CO4790187A1 (en) 1999-05-31
AU7856698A (en) 1999-02-11
CA2244342C (en) 2001-07-24
US6032102A (en) 2000-02-29
DE69836053D1 (en) 2006-11-16
EG21387A (en) 2001-10-31
EP0895097A2 (en) 1999-02-03

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Legal Events

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EEER Examination request
MKLC Lapsed (correction)
MKLA Lapsed

Effective date: 20140729